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Finding the Fourth Proportional to 85,466.37, 128,245.46 and 35,580.90

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Solution

The fourth proportional to 85,466.37, 128,245.46 and 35,580.90 is: 53,390.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,466.37 : 128,245.46 = 35,580.90 : x
  2. Step 2: Convert to fraction form
    85,466.37/128,245.46 = 35,580.90/x
  3. Step 3: Cross multiply
    85,466.37x = 128,245.46 × 35,580.90
  4. Step 4: Simplify right side
    85,466.37x = 4,563,088,709.81
  5. Step 5: Solve for x
    x = 4,563,088,709.81/85,466.37
  6. Step 6: Final answer
    x = 53,390.46

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.